The joining of metals is often associated to metallurgical problems. Specifically, metallurgical
transformations in the HAZ (Heat Affected Zone) can occur, what lead to undesirable
microestructural changes. The HAZ is a difficult region for studying due to its small
dimensions and high thermal gradientes. Thus, in order to overcome this limitation of the
HAZ study, there are in the literature different proposes of HAZ-simulator machines (physical
simulation), which uses the Joule effect for heating specific coupons that cool down by
conduction and convection. This approach intends to simulate the thermal cycle in a real
HAZ obtained in a real welding. However, the use of traditional coupons with cylindrical
geometry presents restrictions of portraying the real case, i.e., the welding. In the cylindrical
geometry option, the obtained thermal cycles do not present temperature gradients closer to
the ones in real weldments. Hence, to overcome this limitation, finite elements modeling
was carried out and different coupon geometries were simulated. The objective is to reach
thermal cycles as close as possible to the ones obtained in a real situation, for a
subsequent physical simulation. This approach showed proper and the physical and
numerical present coherent results. The next step is the physical simulation validation by
comparing to real weldments. This would be the most intuitive way. However, it was
proposed to conduct this validation by determining CCT (Continuous Cooling
Transformation) diagrams. This approach has the advantage of reaching important
technological results at the same time of validating the physical simulation, since CCD
diagrams dedicated to welding are very difficult to find in literature. It is possible to concluded
that the physical simulation does represent the HAZ and can be used to build up CCT
diagrams